/// <summary>
/// Called when the user tries to upload a quiz
/// </summary>
/// <param name="sender"> </param>
/// <param name="e"> </param>
private async void SyncUpload_Clicked(object sender, EventArgs e)
{
ImageButton button = (sender as ImageButton);
ActivityIndicator indicatorSyncing = (button.Parent as StackLayout).Children[(int)UISyncStatus.Syncing] as ActivityIndicator;
string quizPath = "/" + button.StyleId + "/" + button.ClassId;
button.IsVisible = false;
indicatorSyncing.IsVisible = true;
indicatorSyncing.IsRunning = true;
if (await Task.Run(async() => await ServerOperations.SendQuiz(quizPath)))
{
ImageButton buttonSyncNoChange = (button.Parent as StackLayout).Children[(int)UISyncStatus.NoChange] as ImageButton;
indicatorSyncing.IsVisible = false;
buttonSyncNoChange.IsVisible = true;
}
else // if it failed to upload
{
indicatorSyncing.IsVisible = false;
button.IsVisible = true;
await this.DisplayAlert("Quiz Upload Failed",
"This quiz could not be uploaded to the server. Please try again.",
"OK");
}
indicatorSyncing.IsRunning = false;
this.QuizNumber.Text =
"You have published a total of " +
await Task.Run(() => ServerOperations.GetNumberOfQuizzesByAuthorName(CredentialManager.Username)) +
" quizzes!";
}
/// <summary>
/// Deletes the quiz from the roster
/// </summary>
private async Task ButtonDelete_Clicked(string DBId)
{
bool answer = await this.DisplayAlert("Are you sure you want to delete this quiz?", "This will delete the copy on your device and in the cloud. This is not reversable.", "Yes", "No");
if (answer)
{
// Acquire QuizInfo from roster
QuizInfo rosterInfo = QuizRosterDatabase.GetQuizInfo(DBId);
string path = rosterInfo.RelativePath;
if (rosterInfo != null)
{
string dbId = rosterInfo.DBId;
// tell the roster that the quiz is deleted
QuizInfo rosterInfoUpdated = new QuizInfo(rosterInfo)
{
IsDeletedLocally = true,
LastModifiedDate = DateTime.Now.ToString()
};
QuizRosterDatabase.EditQuizInfo(rosterInfoUpdated);
// If connected, tell server to delete this quiz If not, it will tell server to delete next time it is connected in QuizRosterDatabase.UpdateLocalDatabase()
OperationReturnMessage returnMessage = await ServerOperations.DeleteQuiz(dbId);
if (returnMessage == OperationReturnMessage.True)
{
QuizRosterDatabase.DeleteQuizInfo(dbId);
}
if (System.IO.Directory.Exists(path))
{
Directory.Delete(path, true);
}
this.QuizNumber.Text =
"You have published a total of " +
await Task.Run(() => ServerOperations.GetNumberOfQuizzesByAuthorName(CredentialManager.Username)) +
" quizzes!";
}
else
{
await DisplayAlert("Could not delete quiz", "This quiz could not be deleted at this time. Please try again later", "OK");
}
// Setup Page again after deletion
await this.UpdateProfilePageAsync();
}
}
/// <summary>
/// Loads the profile content if the user is logged in.
/// </summary>
/// <returns> </returns>
private async Task UpdateProfileContentAsync(string category)
{
if (!this.IsContentLoading)
{
this.IsContentLoading = true;
this.QuizNumber.IsVisible = true;
this.PickerCategory.IsVisible = false;
this.PickerCategory.IsEnabled = false;
this.StackLayoutQuizStack.Children.Clear();
this.StackLayoutQuizStack.IsEnabled = false;
this.ActivityIndicator.IsVisible = true;
this.ActivityIndicator.IsRunning = true;
await Task.Run(async() =>
{
await this.SetupQuizzes(category);
int createdCountFromServer = ServerOperations.GetNumberOfQuizzesByAuthorName(CredentialManager.Username);
string frameMessage = "";
if (createdCountFromServer >= 0) // Returns -1 if can't connect to server
{
if (createdCountFromServer == 0 &&
!QuizRosterDatabase.GetRoster()
.Any(quizInfo => quizInfo.AuthorName == CredentialManager.Username))
{
frameMessage = "You haven't made any quizzes yet!";
Device.BeginInvokeOnMainThread(() =>
{
this.PickerCategory.IsVisible = false;
this.QuizNumber.IsVisible = false;
});
}
else
{
Device.BeginInvokeOnMainThread(() =>
{
this.QuizNumber.Text = "You have published a total of " + createdCountFromServer + " quizzes!";
this.PickerCategory.IsVisible = true;
this.PickerCategory.IsEnabled = true;
});
}
}
else
{
frameMessage = "Could not connect to BizQuiz servers. Please try again later.";
Device.BeginInvokeOnMainThread(() =>
{
this.PickerCategory.IsVisible = true;
this.PickerCategory.IsEnabled = true;
});
}
if (frameMessage != "")
{
Frame frame = new Frame()
{
CornerRadius = 10,
HorizontalOptions = LayoutOptions.CenterAndExpand,
Content = new Label
{
Text = frameMessage,
HorizontalTextAlignment = TextAlignment.Center,
FontSize = 38
}
};
Device.BeginInvokeOnMainThread(() =>
this.StackLayoutQuizStack.Children.Add(frame));
}
});
if (this.ToolbarItems.Count <= 0)
{
ToolbarItem accountSettingsButton = new ToolbarItem();
accountSettingsButton.Clicked += this.ToolbarItemAccountSettings_Clicked;
accountSettingsButton.Icon = ImageSource.FromFile("ic_settings_white_48dp.png") as FileImageSource;
this.ToolbarItems.Add(accountSettingsButton);
}
this.IsOnLoginPage = false;
this.ActivityIndicator.IsRunning = false;
this.ActivityIndicator.IsVisible = false;
this.StackLayoutQuizStack.IsEnabled = true;
this.IsContentLoading = false;
}
}
